<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="../build/react/umd/react.development.js"></script>
    <script src="../build/react-dom/umd/react-dom.development.js"></script>
    <script src="../build/babel/babel.min.js"></script>
</head>

<body>
        <div id="root"></div>
        <script type="text/babel">
        class Input extends React.Component {
            constructor(props) {
                super(props)
                this.state = {
                    value: 'Hello!'
                }
                this.handleChange = this.handleChange.bind(this);
            }

            handleChange(event) {
                this.setState({ value: event.target.value });
            }

            render() {
                var value = this.state.value;
                return (
                    <div>
                    <input type="text" value={value} onChange={this.handleChange} />
                    <p>{value}</p>
                    </div>
                );
            }
        }
            
        ReactDOM.render(<Input/>, document.getElementById('root'));
        </script>
</body>

</html>